From mboxrd@z Thu Jan  1 00:00:00 1970
From: haojian.zhuang@gmail.com (Haojian Zhuang)
Date: Fri, 19 Mar 2010 11:48:42 -0400
Subject: [PATCH 4/5] ASoc: support codec via ssp interface in aspenite
In-Reply-To: <20100318120153.GG3080@opensource.wolfsonmicro.com>
References: <771cded01003171931s6b2a9502o379492396e41e82b@mail.gmail.com>
	<20100318120153.GG3080@opensource.wolfsonmicro.com>
Message-ID: <771cded01003190848h386ba184u2bc3ed0ea6ad093a@mail.gmail.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Thu, Mar 18, 2010 at 8:01 AM, Mark Brown
<broonie@opensource.wolfsonmicro.com> wrote:
> On Wed, Mar 17, 2010 at 10:31:43PM -0400, Haojian Zhuang wrote:
>
>> ?sound/soc/pxa/Kconfig ? ? ?| ? 15 ++-
>> ?sound/soc/pxa/Makefile ? ? | ? ?4 +
>> ?sound/soc/pxa/aspenite.c ? | ?200 +++++++++++++++++++++++
>> ?sound/soc/pxa/pxa168-ssp.c | ?383 ++++++++++++++++++++++++++++++++++++++++++++
>> ?sound/soc/pxa/pxa168-ssp.h | ? 42 +++++
>
> As I said when you posted this patch previously you need to split this
> up into two separate patches, one adding support for the SSP DAI and the
> other adding the machine driver. ?The PXA168 support is a separate thing
> to the Aspenite machine support. ?Please address this for the next
> iteration of the patch.
>
Fixed.
>> + ? ? /* Speaker connected to LOUT2/OUT4 & OUT3/ROUT2 */
>> + ? ? {"Headset Speaker", NULL, "LOUT2"},
>> + ? ? {"Headset Speaker", NULL, "OUT4"},
>> + ? ? {"Headset Speaker", NULL, "OUT3"},
>> + ? ? {"Headset Speaker", NULL, "ROUT2"},
>
> This looks like it's two speakers rahter than a single one?
>
Changed to two speakers.

>> + ? ? rate = ?params_rate(params);
>> + ? ? width = snd_pcm_format_physical_width(params_format(params));
>> + ? ? channel = params_channels(params);
>> + ? ? ret = seek_mclk_conf(rate, width, channel);
>> + ? ? if (ret < 0)
>> + ? ? ? ? ? ? return ret;
>
> seek_mclk_conf() hasn't been prototyped or declared at this point.
>
> Probably better to include some blank space betwen the assignment of
> width and channel and this stuff for legibility.
>
seek_mclk_conf() is declared in pxa168-ssp.h.

>> + ? ? index = ret;
>> + ? ? mclk = get_mclk(ret);
>> +
>> + ? ? /* set codec DAI configuration */
>> + ? ? ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
>> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | SND_SOC_DAIFMT_NB_IF
>> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? | SND_SOC_DAIFMT_CBS_CFS);
>> + ? ? if (ret < 0)
>> + ? ? ? ? ? ? return ret;
>
> As I said last time it seems odd that you are using an inverted frame
> clock here - why is this? ?A comment explaining the decision would be
> better.
>
New comment is added into code.

>> +static int aspenite_hifi_hw_free(struct snd_pcm_substream *substream)
>> +{
>> + ? ? return 0;
>> +}
>
> As I said last time please remove this function if it's empty. ?It is
> very disappointing to see all these review comments from last time which
> have not been addressed.
>
Fixed.

>> +/* Seek the index of MCLK configuration table */
>> +int seek_mclk_conf(int rate, int format, int channel)
>> +{
>> + ? ? int i;
>> +
>> + ? ? for (i = 0; i < ARRAY_SIZE(mclk_conf); i++) {
>> + ? ? ? ? ? ? if ((mclk_conf[i].rate == rate)
>> + ? ? ? ? ? ? ? ? ? ? && (mclk_conf[i].format == format)
>> + ? ? ? ? ? ? ? ? ? ? && (mclk_conf[i].channel == channel))
>> + ? ? ? ? ? ? ? ? ? ? return i;
>> + ? ? }
>> + ? ? return -EINVAL;
>> +}
>
> These functions should all be either static or namespaced. ?If they're
> supposed to be used by machine drivers they need EXPORT_SYMBOL_GPL().
>
Fixed.

>> + * Set the SSP ports SYSCLK only from Audio SYSCLK.
>> + */
>> +static int pxa168_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
>> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?unsigned int freq, int dir)
>> +{
>> + ? ? struct ssp_priv *priv = cpu_dai->private_data;
>> + ? ? struct ssp_device *ssp = priv->ssp;
>> + ? ? unsigned int sscr0, data, asysdr, asspdr;
>> +
>> + ? ? dev_dbg(&ssp->pdev->dev, "%s id: %d, clk_id %d, freq %u\n",
>> + ? ? ? ? ? ? __func__, cpu_dai->id, clk_id, freq);
>> +
>> + ? ? switch (clk_id) {
>> + ? ? case PXA168_ASYSCLK_MASTER:
>> + ? ? case PXA168_ASYSCLK_SLAVE:
>> + ? ? ? ? ? ? break;
>
> Are these really two different clocks, or is it the same clock as an
> input and and ouput in which case the dir parameter should be being
> used.
>
It's same clock. Code is changed.

>> + ? ? ssp_disable(ssp);
>> + ? ? clk_disable(ssp->clk); ? ? ? ? ? ? ? ? ?/* SSP port internal clock */
>> +
>> + ? ? /* clear ECS, NCS, MOD, ACS */
>> + ? ? sscr0 = ssp_read_reg(ssp, SSCR0);
>> + ? ? data = sscr0 & ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
>> + ? ? if (sscr0 != data)
>> + ? ? ? ? ? ? ssp_write_reg(ssp, SSCR0, data);
>> +
>> + ? ? /* update divider register in MPMU */
>> + ? ? __raw_writel(asysdr, MPMU_ASYSDR);
>> + ? ? __raw_writel(asspdr, MPMU_ASSPDR);
>> +
>> + ? ? clk_enable(ssp->clk); ? ? ? ? ? ? ? ? ? /* SSP port internal clock */
>> + ? ? ssp_enable(ssp);
>
> Should the clock enable perhaps be folded into ssp_enable()?
>
No, I think that it's unnecessary.

>> +static int pxa168_ssp_hw_params(struct snd_pcm_substream *substream,
>> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? struct snd_pcm_hw_params *params,
>> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? struct snd_soc_dai *dai)
>> +{
>
> Does this really need to be different to the PXA2xx SSP port? ?I'm not
> spotting anything in here that looks outrageously different. ?I'm not
> spotting anything in here that looks outrageously different. ?I'm not
> spotting anything in here that looks outrageously different. ?I'm not
> spotting anything in here that looks outrageously different.
>
Some difference is still existed since cpu_is_pxa3xx() is used. It's
valid for ARCH_PXA, not ARCH_MMP.

>> +struct snd_soc_dai pxa168_ssp_dai[PXA168_DAI_SSP_MAX];
>> +EXPORT_SYMBOL(pxa168_ssp_dai);
>
> EXPORT_SYMBOL_GPL, the ASoC core is _GPL.
>
Fixed.

>> + ? ? for (i = 0; i < PXA168_DAI_SSP_MAX; i++) {
>> + ? ? ? ? ? ? dai = &pxa168_ssp_dai[i];
>> + ? ? ? ? ? ? dai->name = "pxa168-ssp";
>> + ? ? ? ? ? ? dai->id = i;
>> + ? ? ? ? ? ? dai->playback.channels_min = 1;
>> + ? ? ? ? ? ? dai->playback.channels_max = 2;
>> + ? ? ? ? ? ? dai->playback.rates = PXA168_SSP_RATES;
>> + ? ? ? ? ? ? dai->playback.formats = PXA168_SSP_FORMATS;
>> + ? ? ? ? ? ? dai->capture.channels_min = 1;
>> + ? ? ? ? ? ? dai->capture.channels_max = 2;
>> + ? ? ? ? ? ? dai->capture.rates = PXA168_SSP_RATES;
>> + ? ? ? ? ? ? dai->capture.formats = PXA168_SSP_FORMATS;
>> + ? ? ? ? ? ? dai->ops = &pxa168_ssp_dai_ops;
>
> Why are these being initialised at runtime? ?There's no system
> dependencies in the initialisation.
>
OK. Changed it.

>> +
>> +#define PXA168_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | ? ? ? \
>> + ? ? ? ? ? ? ? ? ? ? SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | ? \
>> + ? ? ? ? ? ? ? ? ? ? SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | ? \
>> + ? ? ? ? ? ? ? ? ? ? SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | ? \
>> + ? ? ? ? ? ? ? ? ? ? SNDRV_PCM_RATE_96000)
>
> This is SNDRV_PCM_RATE_8000_96000. ?Neither this nor the format define
> should be being exported to others drivers.
>
Fixed.

>> +/* pxa DAI SSP IDs */
>> +enum {
>> + ? ? PXA168_DAI_SSP1,
>> + ? ? PXA168_DAI_SSP2,
>> + ? ? PXA168_DAI_SSP3,
>> + ? ? PXA168_DAI_SSP4,
>> + ? ? PXA168_DAI_SSP5,
>> + ? ? PXA168_DAI_SSP_MAX,
>> +};
>
> ...
>
>> +extern struct snd_soc_dai pxa168_ssp_dai[5];
>
> These two aren't joined up with each other.
>
Fixed.

Fixed patches will be sent in a new conversation.

Thanks
Haojian